Cold truth inc.
BW doesn't give a **** about balancing PvP, probably never will. If you want a competitive game, SWTOR isn't it. It's never balanced, stunlocks are out of control and there are 2-3 dominate classes that also happen to be easy mode.
Another issue with TOR PvP, is balance will always be noticeable, as the game doesn't have a very high skill ceiling, especially compared to other PvP based games. I'm pretty sure the only class I ever found to require any effort is Mara and it's still easy to get good at when compared to other games. Though Mara is at the mercy of the enemies skill more than your own.
If you're competitive and PvP in this game frustrates you, due to stun locks, perpetual FotM or cheese like premades in normals, then find a new game. You won't regret it.
(No, I'm not angry at SWTOR, I just always see rant threads and complaints in PvP forums and had to post my 2 cents. I still play PvP some, but I'm quitting the game soon anyway. I never found PvP in SWTOR to feel rewarding or be as challenging as games I was deeply invested in the past. Games like GoW, H2, LoL, SC2, DOTA, H3 & TF2, the challenge, skill floor and ceiling in SWTOR just doesn't compare to any of those, even LoL, lol.